... % Magnesium Sulphate Heptahydrate Fertilizer transparent crystal very dry, free flowing used in fertilizer Magnesium sulphate,also named magnesium sulfate heptahydrate, epsom ... , it is MgSO4·7H2O.It can be used in medicine, textile, papermaking, metallurgy, electronics, or used as fertilizer, feedstuff additives.99% Magnesium sulfate ...